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freebsd_fork.c revision 1.6 
      1 /*	$NetBSD: freebsd_fork.c,v 1.6 2007/12/20 23:02:47 dsl Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the NetBSD
     18  *	Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: freebsd_fork.c,v 1.6 2007/12/20 23:02:47 dsl Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/proc.h>
     42 #include <sys/errno.h>
     43 #include <sys/uio.h>
     44 #include <sys/signal.h>
     45 #include <sys/mount.h>
     46 #include <sys/syscallargs.h>
     47 
     48 #include <compat/sys/signal.h>
     49 #include <compat/sys/signalvar.h>
     50 
     51 #include <compat/freebsd/freebsd_syscallargs.h>
     52 #include <compat/freebsd/freebsd_fork.h>
     53 
     54 #include <machine/freebsd_machdep.h>
     55 
     56 /*
     57  * rfork()
     58  */
     59 int
     60 freebsd_sys_rfork(struct lwp *l, const struct freebsd_sys_rfork_args *uap, register_t *retval)
     61 {
     62 	/* {
     63 		syscallargs(int) flags;
     64 	} */
     65 	int flags;
     66 
     67 	flags = 0;
     68 
     69 	if ((SCARG(uap, flags)
     70 	    & (FREEBSD_RFFDG | FREEBSD_RFCFDG))
     71 	    == (FREEBSD_RFFDG | FREEBSD_RFCFDG))
     72 		return (EINVAL);
     73 
     74 	if ((SCARG(uap, flags) & FREEBSD_RFPROC) == 0)
     75 		return (EINVAL);
     76 
     77 	if (SCARG(uap, flags) & FREEBSD_RFNOWAIT)
     78 		flags |= FORK_NOWAIT;
     79 	if (SCARG(uap, flags) & FREEBSD_RFMEM)
     80 		flags |= FORK_SHAREVM;
     81 	if (SCARG(uap, flags) & FREEBSD_RFSIGSHARE)
     82 		flags |= FORK_SHARESIGS;
     83 
     84 	if (SCARG(uap, flags) & FREEBSD_RFCFDG)
     85 		flags |= FORK_CLEANFILES;
     86 	else if ((SCARG(uap, flags) & FREEBSD_RFFDG) == 0)
     87 		flags |= FORK_SHAREFILES;
     88 
     89 	return (fork1(l, flags,
     90 	    SCARG(uap, flags) & FREEBSD_RFLINUXTHPN ? SIGUSR1 : SIGCHLD,
     91 	    NULL, 0, NULL, NULL, retval, NULL));
     92 }
     93